How do reflecting telescopes work
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Depending on the type of reflecting telescope, the two mirrors can be a combination of concave, convex and flat mirrors. The secondary mirror, when flat, is placed at a 45-degree angle.
To obtain an image, the telescope is aimed at an object, and the light enters the tube. The light hits the primary mirror and is reflected to the secondary mirror. It is then reflected from the secondary mirror to the eyepiece, where the image is magnified and sent to the eye.
Compound light microscopes use multiple lenses to view objects that are too small to be seen with the naked eye. These microscopes contain at least two lenses: an objective lens that is held near the object being viewed and an eyepiece--or ocular--lens that is positioned near the eye. Focal length is the most important characteristic of a lens and is related to how much the lens magnifies an object.
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